Properties of the Number 28855

Twenty-Eight Thousand Eight Hundred Fifty-Five

Basics

Value: 28854 → 28855 → 28856

Parity: odd

Prime: No

Previous Prime: 28843

Next Prime: 28859

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 5 × 29 × 199

Divisors: 1, 5, 29, 145, 199, 995, 5771, 28855

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000010110111

Octal: 70267

Duodecimal: 14847

Hexadecimal: 70b7

Square: 832611025

Square Root: 169.86759549719895

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

9-gonal (or enneagonal) pyramidal numbers: a(n) = n*(n+1)*(7·n-4)/6. A7584

a(n) is the smallest n-gonal pyramidal number with binary weight n. A358931

Number of hill-free Dyck paths of semilength n+3 and having no peaks at level 2 (a Dyck path is said to be hill-free if it has no peaks at level 1). A114627

Triangle read by rows: T(n,k) is the number of hill-free Dyck paths of semilength n and having k peaks at level 2; 0<= k<=n-1, n>=2 (a Dyck path is said to be hill-free if it has no peaks at level 1). A114626

Odd 9-gonal (nonagonal) pyramidal numbers. A218328

Number of (n+1)X5 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors. A205732

Number of prime unlabeled topologies (i.e., prime homeomorphism classes) on n points. A28855